avlnode.h (1997B)
1 /* ISC license. */ 2 3 #ifndef SKALIBS_AVLNODE_H 4 #define SKALIBS_AVLNODE_H 5 6 #include <stdint.h> 7 8 #include <skalibs/gccattributes.h> 9 #include <skalibs/functypes.h> 10 11 12 #define AVLNODE_MAXDEPTH 49 /* enough for 2^32 nodes in the worst case */ 13 14 typedef int avliter_func (uint32_t, unsigned int, void *) ; 15 typedef avliter_func *avliter_func_ref ; 16 17 typedef struct avlnode_s avlnode, *avlnode_ref ; 18 struct avlnode_s 19 { 20 uint32_t data ; 21 uint32_t child[2] ; 22 signed char balance : 2 ; 23 } ; 24 25 #define AVLNODE_ZERO { .data = 0, .child = { UINT32_MAX, UINT32_MAX }, .balance = 0 } 26 extern avlnode const avlnode_zero ; 27 28 extern uint32_t avlnode_searchnode (avlnode const *, uint32_t, uint32_t, void const *, dtok_func_ref, cmp_func_ref, void *) ; 29 extern int avlnode_search (avlnode const *, uint32_t, uint32_t, void const *, uint32_t *, dtok_func_ref, cmp_func_ref, void *) ; 30 extern unsigned int avlnode_height (avlnode const *, uint32_t, uint32_t) gccattr_pure ; 31 32 extern uint32_t avlnode_extremenode (avlnode const *, uint32_t, uint32_t, int) gccattr_pure ; 33 #define avlnode_minnode(s, max, r) avlnode_extremenode(s, max, (r), 0) 34 #define avlnode_maxnode(s, max, r) avlnode_extremenode(s, max, (r), 1) 35 36 extern int avlnode_extreme (avlnode const *, uint32_t, uint32_t, int, uint32_t *) ; 37 #define avlnode_min(s, max, r, data) avlnode_extreme(s, max, (r), 0, data) 38 #define avlnode_max(s, max, r, data) avlnode_extreme(s, max, (r), 1, data) 39 40 extern uint32_t avlnode_insertnode (avlnode *, uint32_t, uint32_t, uint32_t, dtok_func_ref, cmp_func_ref, void *) ; 41 extern uint32_t avlnode_delete (avlnode *, uint32_t, uint32_t *, void const *, dtok_func_ref, cmp_func_ref, void *) ; 42 43 extern uint32_t avlnode_iter_nocancel (avlnode *, uint32_t, uint32_t, uint32_t, avliter_func_ref, void *) ; 44 #define avlnode_iter(tree, max, root, f, stuff) (avlnode_iter_nocancel(tree, max, max, root, f, stuff) == (max)) 45 extern int avlnode_iter_withcancel (avlnode *, uint32_t, uint32_t, avliter_func_ref, avliter_func_ref, void *) ; 46 47 #endif